<!DOCTYPE html>
<link rel="stylesheet" href="../resources/default.css">
<div style="overflow: hidden; width: 450px; height: 450px">
  <iframe srcdoc="
    <link rel='stylesheet' href='../resources/default.css'>
    <iframe class='absolute'></iframe>">
  </iframe>
</div>
<div style="top: 28px; left: 28px" class="absolute green"></div>
<div style="top: 220px; left: 220px" class="absolute yellow"></div>
<div style="top: 110px; left: 310px" class="absolute blue"></div>
